ISO 4064-3:2024

Overview

ISO 4064-3:2024 - "Water meters for cold potable water and hot water - Part 3: Test report format" defines a standardized test report format to be used together with ISO 4064-1:2024 (metrological and technical requirements) and ISO 4064-2:2024 (test methods / OIML R 49‑1 / R 49‑2). The fifth edition (2024) provides the required structure and checklists for type evaluation reports and initial verification reports for water meters used on cold potable and hot water installations.

Key topics and technical requirements

• Scope and normative references: Specifies that the report format is to be applied in conjunction with ISO 4064-1 and ISO 4064-2 (and corresponding OIML R 49 parts).
• Type evaluation report structure: Detailed templates and fields for:
  • Applicant, manufacturer and testing laboratory identification
  • Model submitted (mechanical, electronic, combined, separable units)
  • Lists of supplementary electronic devices and ancillary devices
• Checklists and tables: Standardized checklists for physical examinations and performance tests to ensure consistent reporting of pass/fail and remarks.
• Tests covered in the report format: Templates for documenting results of required tests referenced in ISO 4064-2, including (but not limited to):
  • Static pressure and pressure-loss tests
  • Water temperature and overload temperature tests
  • Determination of intrinsic errors and meter orientation effects
  • Reverse flow and flow disturbance tests
  • Durability and interchange tests for cartridges/metrological modules
  • Environmental and electromagnetic tests relevant to electronic components (vibration, shock, electrostatic discharge, radiated/conducted emissions, power supply variations)
• Initial verification report: Format for documenting verification of the Equipment Under Test (EUT) and initial metrological performance.

Practical applications and who uses it

ISO 4064-3:2024 is primarily used by:

• Testing laboratories and certification bodies preparing type evaluation and initial verification reports for water meters.
• Manufacturers of mechanical and electronic water meters to prepare documentation for approvals and conformity assessment.
• Legal metrology authorities and utilities that require standardized, auditable test reports for procurement, certification, and field verification.
• Design and quality engineers who need to document compliance with ISO/OIML test methods and environmental requirements.

Practical benefits include consistent, audit-ready reporting, streamlined approval under the OIML Certificate System, and improved interoperability of test data across jurisdictions.

Related standards

• ISO 4064-1:2024 - Metrological and technical requirements
• ISO 4064-2:2024 - Test methods (OIML R 49-1 / R 49-2)
• Corresponding OIML documents: OIML R 49-3 / R 49-4 (aligned editions)

Keywords: ISO 4064-3:2024, water meters, test report format, type evaluation report, initial verification, cold potable water, hot water, ISO 4064-1, ISO 4064-2, OIML R 49.